离心风机的求助? Pressure-containing parts other than fan housing,but including auxiliaries, shall be tested hydrostatically with liquid at a minimum of 11/2 times the maximum allowable working pressure but not less than gauge pressure of 1.5 bar (20 psig)。这句话什么意思(英文意思我明白不用翻译), fan housing 到底要不要做水压?如果不做,为什么?查看更多10个回答 . 5人已关注